"Klopp’s front-men now find themselves in a situation whereby they go into games knowing they have to score at least two to stand a chance of even a point.

"The statistics tell us teams which win the league concede between 0.82 and 0.92 goals a game — and already this season Liverpool are at 1.7.

"So there’s not much wiggle-room and until Klopp addresses his back four — and I hope he does so in the January transfer window — his side are going to find it very difficult to keep up with Mourinho and co."

United are seven points clear of Liverpool, who currently sit seventh in the Premier League.